冲激雷达旋转目标成像方法  

Impulse Radar Imaging of Rotating Objects

作　　者：王乃卫[1] 粟毅[1] 陆仲良[1] 吕彤光[1] 

机构地区：[1]国防科技大学电子工程学院

出　　处：《系统工程与电子技术》1999年第4期15-19,72,共6页Systems Engineering and Electronics

摘　　要：在分析超宽带（ＵＷＢ）雷达旋转目标回波信号频谱特性的基础上，提出了利用目标回波成像和利用目标冲激响应成像两种成像方法，导出了成像公式与点扩展函数。通过计算，给出了点扩展函数的数值解。结果表明，两种成像方法都达到了厘米级的成像精度，利用目标冲激响应成像有较大的图像动态范围。在冲激雷达实验系统上验证这两种成像方法，得到了金属球目标的雷达图像，证明这两种成像方法是可行的。In this paper, the spectral characteristics of ultrawide band (UWB) radar scattering signal from rotating objects are analyzed. Two imaging algorithms are presented, between which one is based on scattering signal in time domain and another is based on impulse response of objects. The calculated results of the point spread function (PSF) validate the theory analysis. With our experimental impulse radar system, images are made based on the two different algorithm. And the results show that the images of the later algorithm are much better.

关 键 词：雷达成像 精度分析 冲击响应 算法 超宽带雷达 

分 类 号：TN958[电子电信—信号与信息处理] TN957.52[电子电信—信息与通信工程]